Internal-combustion engine



Oct. 8, 1929.

J. A. ANGLADA 1,731,035

INTERNAL COMBUSTION ENGINE Filed Feb- 2, 1927 3 Sheets-Sheet 1 Oct. 8', 1929.-

J. A. ANGLADA 1,731,035 INTERIIJAL couausnon ENGINE Filed Feb. 2, 1927 3 Sheets-Sheet 2 Oct. 8, 1929. ,J L D 1,731,035

INTERNAL COMBUSTION ENGINE Filed Feb. 2, 1927 5 Sheets-Sheet 5 BY m NEYS Patented Oct. 8, 1929 UNITED STATES PATENT OFFICE INTERNAL-COMBUSTION ENGINE Application filed. February 2, 1927. Serial No. 165,345.

This invention relates to an improvement in rotary sleeve valve internal combustion engines.

It is an object of the invention to provide a 5 rotary sleeve valve internal combustion engine having a stationary inner working cylinder removably supported against lateral movement inside the outer cylinder, but free to expand and contract relative to the outer cylinder in accordance with the changes in the temperature of the inner cylinder.

Another object of the invention is to provide a rotary sleeve yalve internal combustion engine in which the valve is artificially cooled adjacent the combustion zone on both the inside and outside.

Another object of the invention is to pro vide a rotary sleeve valve internal combustion engine having a stationary inner working cylinder as described above, and having a removable head positioning the upper end of the working cylinder against lateral movement while permitting longitudinal expansion thereof.

Another object of the invention is to provide a' rotary sleeve valve internal combustion engine having a stationary inner working cylinder supported against lateral movement at each end thereof, and having a detachable water-cooled head forming a combustion chamber and acting to cool the valve sleeve on the inside thereof.

Another object of the invention is to provide improvements and simplification in the manufacture and assembly of a rotary sleeve valve internal combustion engine of the type described above so as to reduce the cost thereof and increase their efliciency.

Various other objects and advantages will appear as the description of the invention proceeds.

Referring now to the drawings, which illustrate various possible forms of embodiments of my invention:

Figure 1 is a side view, partially in section, of an engine embodying one form of my invention;

Figure 2 is a sectional view of one of the cylinders of the engine shown in Figure 1 taken approximately on the line 2-2 of Figure 1;

Figure 3 is a sectional view of a portion of my engine showing a modified means for mounting the inner working cylinder in place;

Figure 4 is a view similar to Figure 3 showing another modified form of mounting means; and

Figure 5 is a view of the lower end of the cylinder, shown in Figure 3, illustrating in detail one method of mounting the valve gear to prevent disengagement thereof from the driving-gear when the inner cylinder is removed.

In the form of the embodiment of my invention illustrated in Figures 1 and 2, the crank case of the engine is designated by the reference numerals 1 and 2, the lower portion of the crank case being removable from the upper portion along the dividing line 3. The crank shaft 4, cou-nterweights 5, connecting rod connections 6 and connecting rods 7 form no part of the present invention but may be considered of conventional construction.

The outer cylinder 8 of my invention is provided with a water jacketed upper portion 9 and a recess 10 in the lower portion thereof for the reception of the valve gear 11 for driving the sleeve valve 12. The outer cylinder 9 may be cast integral with the upper portion 2 of the crank case, or it may be separate from the crank case and connected thereto as by means of bolts 13. The stationary inner cylinder 14 in which the piston 15 reciprocates is prefer ably made for insertion in and removal from the outer cylinder from below and for this purpose is provided with an integral positioning and aligning flange 16 adapted to cooperate with the ledge 17 at the lower end of the stationary cylinder to align the inner cylinder and hold it against lateral movement at the bottom. A ring 18 overlapping the joint be tween the flange 16 and the ledge'17 is suitably bolted or otherwise secured to both the inner and outer cylinder by means of a series of bolts 19 to secure the inner cylinder in place.

The upper end of the stationary working cylinder 14 is positioned against lateral move Add ment between the rotating valve sleeve 12 and an overhanging portion of the detachable water cooled cylinder head 21, which is suitably secured to the outer cylinder 8 by means of bolts or the like 22 and provides a water-cooled combustion space 23, into which the inlet and exhaust openings 24 and 25 lead. A spark plug 26 is insertable through the top of the cylinder head 21 for the purpose of igniting the combustion mixture. The rotary sleeve valve 12 is continuously or intermittently driven by means of the worm valve gear 11 driven by a suitable worm shaft 27 extending along the cylinder block and having worms 28 thereon positioned to drive the valve sleeves of each cylinder in synchrony. A'

suitable space 29 is provided between the upper edge of the inner cylinder 14 and the cylinder head 21 to permit for expansion and contraction of the inner cylinder relative to the outer cylinder under the heat of the engine operation, the length of the overhanging portion 20 being sufficient to give lateral support to the upper end of the inner cylinder 14 at all times. It is to be especially noted, that the overhanging portion 20 is of annular shape and contacts with the inside of the inner cylinder 14 at all points so as to give absolute support against lateral thrusts or lateral movement of the top ot the inner cylinder from any other cause, irrespective of the presence of thevalve sleeve 12 outside the cylinder or of the clearance therebetween. The valve sleeve 12 may be formed integral with the valve gear 11 and inserted in the cylinder from below through the opening of the ledge 17 or, if desired, the upper portion of the valve sleeve may be detachably connected to the drive gear by means of a tooth and slot connection 30, permitting longitudinal removal of the sleeve 12 from the top of the outer cylinder and insuring registry and drive of the sleeve 12 with the valve gear when in place. This construction of engine provides a very simple manufacture and assembly of a rotary sleeve valve internal combustion engine, in which the valve sleeve adjacent the combustion space is artificially cooled and protected against the heat of combustion on both the inside and outside by the water lacket 9 of the outer cylinder and the water Jacketed head 21, and in which ready access 15 provided to the inside of the combustion chamber and cylinder by removal of the head 21 without removing or disturbing any of the other parts of the engine.

The valve gearing and the inner cylinder are insertable in the outer cylinder from below and the chamber 10 of the outer cylinder and flange 16 of the inner cylinder provide a lubricant space surrounding the valve gear 11 and worm 28. The inner cylinder is supported in true alignment and lateral movement thereof under the impulse of the piston is prevented by the flange 16 and ledge 17 at the bottom and by the contact with the overhang 20 at the top, the head 21 being quite accurately spaced in the outer cylinder by the contacting surfaces 8' and 21 Suitable lubricant conducting grooves 12- and 14 may be provided on the valve sleeve and inner cylinder if desired to conduct lubricant from the chamber 10 along the surfaces of these members or, if desired, means may be provided for forcing a lubricant between these members at the top of the sleeve 12.

In Figures 3 and 4 a slightly modified form of construction of the engine embodying the principles outlined in connection with F igures 1 and 2 is shown. In these figures, the inner cylinder 14 is removable and insertable in the outer cylinder from above, and the outer cylinder varies in one important manufacturing advantage from that of the outer cylinder of Figures 1 and 2. In the outer cylinder of Figures 3 and 4, the flange 17 terminates flush with the inside of the upper portion of the cylinder so that the inside of the cylinder and the flange 17 can be machined or bored at the same time. In Figure 3 the inner cylinder 14 is positioned in and secured to the flange 17 a of the outer cylinder by means of a stepped ring 31, which is connected by pins 32 to the flange 17 and by the pins 33 to the inner cylinder l4 so as to prevent rotation. of the inner cylinder. A space 29 is provided between the top of the inner cylinder 14 and the lower edge of the watercooled head 21 and a similar space 29 isprovided between the ledge 14 and the lower step or the ring 31, so as to permit longitudinal expansion and contraction of the inner cylinder both at the top and at the bottom, the cylinder being fitted in the stepped ring 31 or in the overhanging ledge 20 of the cylinder head 21 with a frictional fit, sufiiciently tight to prevent movement of the cylinder 14 by the reciprocation of the piston 15, but which will permit longitudinal expansion or contraction of the cylinder. In the embodiments of the invention illustrated in Figures 3 and 4, the valve gearing 11 is detachably connected to the valvesleeve 12 by a suitable tongue and slot connect-ion 30, as illustrated in connection with Figure 1 and the valve ring 11 is insertable in the inner cylinder from the side, through the opening 34 of the housing for the worm shaft and gear 27 and 28, a suitable cover 35 being provided for this housing. Brackets 36 extend inwardly from the housing to assist in positioning the gear and shaft27. To prevent the gear ring 11 and the worms 28 from being separated, when the inner cylinder is removed, which separation would cause a. disurbing of the timing of the engine, the gear ring 11 is preferably projected upward into the inner cylinder, as illustrated at 11 by approximately the thickness of the upper step of the stepped ring 31, so as to securely position the timing of the valve gear when assembled.

The construction of Figure at is substantially similar to that of Figure 3 with the exception that the stepped ring 31 is replaced by a threaded spacing ring 37 which is bolted to the flange 17 and is provided with threads 38 adapted to receive the threaded lower end 39 of the inner cylinder 14 so as to permit the inner cylinder to be screwed into orout of the ring 37 from above, if desired.

Figure 5 shows a modified form of construction for keeping the valve gear 11 in mesh with the worms 28 on the shaft 27 and thereby preserving the timing of the engine when the sleeve 12 or inner cylinder 14* is removed. In this embodiment, the lubricant chamber 10 is provided with an inset wall 10 along the side of the gear chamber opposite to the worm shaft 27 and the space 40 between the teeth and the inset wall 10 of the lubricant chamber is smaller than the height of the teeth of the gear 11 and of the worm 28 so that when the inner cylinder is removed, the gear 11 cannot move far enough to permit the teeth of the gear 11 to slip out of mesh with the teeth of the worm 28. The space 40 is at the same time sufficiently large to permit the sight movement of the gear 11 and free access of the lubricant of the gear without possibility of the gear rubbing or binding thereagainst.

Various changes in the construction of the embodiments illustrated in the drawings may 3 be made without departing from the spirit of the invention, and I do not therefore desire to limit myself to the specific construction shown and described, but to interpret the invention broadly within the scope of the appended claims. I

What I claim as my invention is:

1. A rotary sleeve valve internal combustion engine, having an outer water cooled cylinder, a stationary inner working cylinder, and a sleeve valve rotating in the space between said cylinders, said stationary inner working cylinder being insertable in the outer cylinder from above, means to aline said inner cylinder at the top and bottom thereof, means to secure said inner cylinder to the bottom of the outer cylinder, meansto permit longitudinal expansion and contraction of the inner cylinder, and a water jacketed combustion chamber in the top of said inner cylinder.

2. In a sleeve valve internal combustion engine, an outer water cooled cylinder, a stationary inner working cylinder, a sleeve valve operating in the space between said cylinders, means to support said inner cylinder at the bottom, means to permit expansion and contraction of the inner cylinder under the heat of engine operation, and a water cooled detachable cylinder head centering said inner cylinder at the top.

3. In a sleeve valve internal combustion engine, an outer water cooled cylinder, a stationary inner working cylinder, means to secure the inner cylinder to the bottom of the outer cylinder, a sleeve valve operating in the space between said cylinders, and a detachable water cooled cylinder head secured to the upperend of said outer cylinder, and supporting the upper end of the inner cylinder against lateral movement while permitting longitudinal movement thereof.

4. In a sleeve valve internal combustion engine, an outer water cooled cylinder, a sta tionary inner working cylinder, means to secure the bottom of the inner cylinder to the bottom of the outer cylinder, said inner cylinder terminating below the top of said outer cylinder, a sleeve valve operating in the space between said cylinders, ports in said sleeve above the top of the inner cylinder, a detachable water cooled cylinder head secured to the top of the outer cylinder and projecting into the top of the inner cylinder to support the same against lateral movement, the portion of the cylinder head between the top of the inner cylinder and the top of the outer cylinder forming a water cooled combustion space, and inlet and exhaust openings to said combustion space through the walls of the outer cylinder and the cylinder head.

5. In a rotary sleeve valve internal combustion engine, an outer cylinder, an inner cylinder, and a sleeve valve rotating in the space between said cylinders, said inner cylinder terminating below said sleeve valve, means for driving said sleeve from the lower end thereof, a detachable connection between the bottom of said sleeve and said driving means,

and a detachable water cooled combustion head filling into the top of said cylinders, and contacting and centering said inner cylinder.

6. In a rotary sleeve valve internal combustion engine, a water cooled outer cylinder, a stationary inner working cylinder, secured to the lower end of the outer cylinder and spaced therefrom and terminating below the top thereof, inlet and outlet ports through the walls of said outer cylinder above the top of the inner cylinder, a ported rotary sleeve valve in the space between said cylinders, the top, of said valve extending above the top of the inner cylinder but terminating below the top of the outer cylinder and a detachable water cooled head fitting into the top of the outer cylinder and extending into the top of the inner cylinder and having, ports registering with the inlet and outlet ports of the outer cylinder there being a space between the top of the inner cylinder and the head to permit expansion and contraction of the inner cylinder.

7. In a rotary sleeve valve internal coma sleeve valve rotating in the space between said cylinders, means to support said inner cylinder at the bottom, and prevent lateral and longitudinal movement thereof, and means to permit expansion and contraction of the inner cylinder under the heat of en gine operation.

8. In a rotary sleeve valve internal combustion engine, an outer cylinder, an inner working cylinder and a sleeve valve rotating in the space between said cylinders, means to support the inner cylinder against lateral and longitudinal movement at the bottom and means to support the inner cylinder against lateral movement at the top while permitting longitudinal expansion thereof, said supporting means at the top including a water jacketed combustion chamber which aids to cool the upper part of the sleeve valve.

9. In a rotary sleeve valve internal combustion engine, an outer water cooled cylinder, a stationary inner working cylinder, detachable means to secure the inner cylinder to the bottom of the outer cylinder, a sleeve valve rotating in the space between said cylinders, and a detachable water cooled cylinder head secured to the upper end of said outer cylinder, and supporting the upper end of the inner cylinder against lateral movement while permitting longitudinal movement thereof.

10. In a rotary sleeve valve internal combustion engine, an outer cylinder, an inner cylinder, and a sleeve valve rotating in the space between said cylinders, means for driving said sleeve from the lower end thereof, a detachable connection between the bottom of said sleeve and said driving means, a detachable water cooled head filling into the top of said cylinders and means for detachably connecting the inner cylinder to the bottom of the outer cylinder for insertion and removal in said outercylinder from the top.

11. In a rotary sleeve valve internal combustion engine, an outer cylinder, an inner cylinder, and a sleeve valve rotating in the space between said cylinders, means for driving said sleevefrom the lower end thereof,-

a detachablemorirrection between the bottom of said sleeve and said driving means, a detachable water cooled head filling into the top of said cylinders, means for detachably connecting the inner cylinder to the bottom of the outer cylinder for insertion and removal in said outer cylinder from the top, and means for preventing disengagement of said driving means when the inner cylinder is removed.

In testimony whereof I have alfixed my signature to this specification.

JOSEPH A. ANGLADA.

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